TI’s Approach to Capacitive Sensing

re: TI’s Approach to Capacitive Sensing by mudz

mudz — Thu, 07 Jan 2016 16:12:00 GMT

Looking forward for this webinar.. Thanks element14Dave

re: TI’s Approach to Capacitive Sensing by Jan Cumps

Jan Cumps — Wed, 27 Jan 2016 14:58:15 GMT

Help! Cant find the link element14Dave

re: TI’s Approach to Capacitive Sensing by element14Dave

element14Dave — Wed, 27 Jan 2016 15:45:27 GMT

For more information about TI’s FDC2214 capacitive sensing family:

Learn more about TI’s capacitive sensing solutions
Download the noise-immune capacitive proximity sensor reference design
Watch videos about the FDC2214 family.
Read blog posts about capacitive sensing design.

Learn about TI’s innovative sensing portfolio

re: TI’s Approach to Capacitive Sensing by element14Dave

element14Dave — Wed, 27 Jan 2016 15:46:04 GMT

You can download the slides for the presentation here

re: TI’s Approach to Capacitive Sensing by Former Member

Former Member — Wed, 27 Jan 2016 16:01:18 GMT

Hello, i use the FDC 2214 EVM with a Raspberry Pi. When I touch the I2C cable or HDMI cable or the power supply cable the sensorvalue change! Is there any option to fix this problem?

re: TI’s Approach to Capacitive Sensing by element14Dave

element14Dave — Wed, 27 Jan 2016 16:23:14 GMT

A recording of the presentation is now available on the "Webinar Recording" tab of the above page. Enjoy!

re: TI’s Approach to Capacitive Sensing by element14Dave

element14Dave — Thu, 04 Feb 2016 16:12:52 GMT

Below are the Question and Answers from the Webinar:

Can the sensor detect layers in a liquid?

[Kraemer, Andreas] No, not really.

Can the sensor detect a change in liquids from one substance to another. Ie water with oil added. Could it detect the change?

[Kraemer, Andreas] Two different liquid mixtures do have a different dielectric constant. So if the sensor is fully covered by the liquid there will be a change in reading.

Can the sensor detect changes in liquid conductivity.

[Kraemer, Andreas] No, typically not using capacitive sensing. Depending on the conductivity it might be possible to solve the problem using inductive sensing.

Could it detect flow?

[Kraemer, Andreas] No, not as far as I know.

If I have a SMPS running at exactly the same frequency as the osc. in the sensing system is it then possible to change the tank's tuning frequency?

[Kraemer, Andreas] Yes, changing the tank’s frequency can do done just by changing the inductance in the tank.

Is it possible to detect the size of droplets falling through a confined area?

[Kraemer, Andreas] As long as the droplet stay in the sensing range over the conversion time (some ms) yes.

Deneral detection range for both non conductive or conductive?

[Kraemer, Andreas] This is not easy to answer as it depends heavily on the mechanical size of the sensor. Up to 50cm is feasible. Longer distance could be possible if the sensor can be really large

EMC compliance a problem?

[Kraemer, Andreas] EMI is always a problem in cap sensing solutions. The FDC2x1x family is drastically less affected by radiated noise than traditional charge based solutions. There are several possibilities to make the system EMC compliant.